JSFiddle - React, Tailwind, and code Playground

by Milan Karagunović

HTML

<div id="head"></div>
<div id="online"></div>

CSS

#head {
    background: #555;
    width: 600px;
    height: 60px;
    border: 1px solid gray;
}
#online {
    width: 600px;
    border: 1px solid gray;
}

JavaScript

$("#online").css({ height: $(window).height() - 40 - $("#head").height() +'px' });